Where to Buy Anti-Reflective Glasses?
From the above, you have learned some benefits of anti-reflective glasses. You may ask where I can buy them. To do that, you can buy them from the local optical store. But now, you can buy them online and it can bring you great convenience.
So, if you want to buy anti-reflective glasses online, Koalaeye Optical is recommended. It provides all kinds of eyeglasses, sunglasses, and frames. What’s more, Koalaeye Optical provides a free shipping service so that the package will be mailed for you with your great convenience.
Cosmetic Contact Lenses & Chromatic Contact Lenses
We are used to referring to chromatic contact lenses as beautiful contact lenses. In fact, beautiful contact lenses are a registered trademark of Johnson & Johnson in 2007. It is the name of a product series of Johnson & Johnson. Not all chromatic contact lenses are called beautiful contact lenses. Regular contact lenses can have complications if they are not properly worn, and these can also be seen in chromatic contact lenses. But because the color piece was much a layer of pigment, if the quality is not up to standard, there will be greater safety hidden trouble.
Pay attention to the color of your blue-blocking glasses.
For children, their lenses are relatively clean and clear, and the blue light transmittance is higher than that of adults, which is more harmful to the eye. On the complementary color principle of optics, a good pair of blue light glasses should not be deep orange, but light yellow. The complementary color to cyan is orange. So, in order for the glasses to absorb blue light and filter it out, they must appear blue's complementary color yellow, otherwise, they violate the optical principle of absorbing blue light.
How Do Progressive Lenses Work?
How do progressive lenses work? You may have this problem. As is well known, when you are over 40, your vision begins to deteriorate and you may suffer the presbyopia condition. So, with the progressive lenses, you can see at all distances with one pair of glasses. They start with your distance prescription at the top of the lens and increase as you move toward the bottom of the lens.
Then you move your head position to allow you to focus through different areas of the lens. Move your head upwards to see something in the distance, hold it straight for intermediate or arm’s length vision and down for near vision for objects that are close up.
In addition, progressive lenses avoid the visual discontinuity or image-jump when your eyes shift from one zone to the other in non-progressive multifocals since there are no distinct lines in progressive lenses.
There are three processes for resin-changing lenses.
The incorporation method, known as bulk polymerization, is similar to the method of glass lens, that is, one or more photochromic dyes are directly incorporated into the polymer monomer of the substrate for bulk polymerization, and the lens formed after curing will change color. Discoloration dye is completely integrated into the resin lens substrate, so the lens made of color persistence is very good.
The uniformity of discoloration and the depth of color after discoloration are highly related to the thickness of the lens. Because the thickness of the lenses at all levels is different, there will be a color difference between the depth of discoloration and the uniformity, and the uneven phenomenon of high brightness is more obvious.
The film type is known as the coating method. It is the chromatic resin lens by coating or dipping in a layer of chromatic dye on the base of the resin lens. Because the coating covers the surface of the lens, the color uniformity is good. The coating, which is only about 0.05mm thick, does not provide enough molecules to make the lens dark enough, so the color is relatively less dark, and the discoloration lasts slightly longer.
Infiltration, known as the penetration method, is to use the principle of penetration, through the thermal diffusion method to make the color dye permeate the surface of the resin lens sheet material, with diffusion depth up to 0.15~0.20mm. The lens has a constant color change characteristic. There will be no inconsistency between the center and the surrounding color as the luminosity gets darker. The color-changing resin lens made by infiltration type has the benefits of uniform color-changing, small color difference, fast and thorough color-fading, which is the mainstream of color-changing technology at present.
What to consider when buying eyeglasses?
Usually, people with lighter skin tones choose lighter color frames, while those with darker skin tones choose dark color frames. For example, people with lighter skin tones can choose soft pink frames, tortoiseshell frames, or gold and silver frames, while those with darker skin tones can choose red, black, or tortoiseshell frames.
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